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var _ie = (_info.indexOf("MSIE") > 0 && _info.indexOf("Win") > 0 && _info.indexOf("Windows
3.1") < 0);
is probably the unterminated String problem. Make SURE it is all on one line in the source code. If it overflows in your editor, break up the statement in a NON-STRING area, like press return where the '&&' is.